package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;


import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

/**
 * @author rookie001
 * @creat 2023-04-24-9:29
 */
@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;//菜品
    @Autowired
    private DishFlavorMapper dishFlavorMapper;//菜品口味
    @Autowired
    private SetmealDishMapper setmealDishMapper;//套餐

    //新增菜品和对应口味
    //添加事务
    @Transactional
    @Override
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);//插入数据
        Long dishId = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
//            flavors.forEach(dishFlavor -> {
//                dishFlavor.setDishId(dishId);
//            });
            dishFlavorMapper.insertBatch(flavors, dishId);//插入口味
        }
    }

    //菜品分页查询
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        Page<Object> objects = PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.getPageSize(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /*
    *           可以一次删除一个菜品，也可以批量删除菜品
    -           起售中的菜品不能删除
    -           被套餐关联的菜品不能删除
    -           删除菜品后，关联的口味数据也需要删除掉*/
    //批量删除
    @Transactional
    @Override
    public void delectBatch(List<Long> ids) {
//        for (Long id : ids) {
//            //判断当前菜品是否为起售状态
//            Dish dish = dishMapper.getByid(id);//查询菜品
//            if (dish.getStatus() == StatusConstant.ENABLE) {
//                //若为起售则不能删除
//                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
//            }
//        }
        Long count = dishMapper.getDelectByid(ids);
        if (count > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
        }
        //判断当前菜品是否被套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);//根据菜品id查询关联套餐id
        if (setmealIds != null && setmealIds.size() > 0) {
            //若被关联则不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        for (Long id : ids) {
            //删除菜品表中的菜品数据
            dishMapper.deleteById(id);
            //删除菜品关联的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }
    }

    //根据id查询
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        Dish dish = dishMapper.getByid(id);
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    //修改菜品
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //修改菜品表
        dishMapper.update(dish);
        //删除原有口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors.size() > 0 && flavors != null) {
//            flavors.forEach(dishFlavor -> {
//                //设置口味
//                dishFlavor.setDishId(dishDTO.getId());
//            });
            //插入口味数据
            dishFlavorMapper.insertBatch(flavors, dishDTO.getId());
        }

    }

    //启用禁用菜品
    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder().id(id).status(status).build();
        dishMapper.update(dish);
    }

    //根据分类id查找菜品
    @Override
    public List<Dish> getDishByid(Long categoryId) {
        List<Dish> dish = dishMapper.getDishByid(categoryId);
        return dish;
    }

    //条件查询菜品和口味
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.getCategoryByid(dish.getCategoryId());//根据分类id查找菜品
        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d, dishVO);
            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());
            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }
        return dishVOList;
    }
}
